The Diameter of a Typical Planetary Nebula, After 10,000 Years

question 72

Multiple Choice

The diameter of a typical planetary nebula, after 10,000 years of expansion, is

• A) about 1000 ly.
• B) about 1 au.
• C) only about 3 to 5 stellar diameters.
• D) a few light-years.

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